/****************************************************************************** * xen-x86_32.h * * Guest OS interface to x86 32-bit Xen. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to * deal in the Software without restriction, including without limitation the * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or * sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. * * Copyright (c) 2004-2007, K A Fraser */ #ifndef __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__ #define __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__ /* * Hypercall interface: * Input: %ebx, %ecx, %edx, %esi, %edi (arguments 1-5) * Output: %eax * Access is via hypercall page (set up by guest loader or via a Xen MSR): * call hypercall_page + hypercall-number * 32 * Clobbered: Argument registers (e.g., 2-arg hypercall clobbers %ebx,%ecx) */ /* * Direct hypercall interface: * As above, except the entry sequence to the hypervisor is: * mov $hypercall-number*32,%eax ; int $0x82 */ #if !defined(_ASM) #define TRAP_INSTR "int $0x82" #else #define TRAP_INSTR int $0x82 #endif /* * These flat segments are in the Xen-private section of every GDT. Since these * are also present in the initial GDT, many OSes will be able to avoid * installing their own GDT. */ #define FLAT_RING1_CS 0xe019 /* GDT index 259 */ #define FLAT_RING1_DS 0xe021 /* GDT index 260 */ #define FLAT_RING1_SS 0xe021 /* GDT index 260 */ #define FLAT_RING3_CS 0xe02b /* GDT index 261 */ #define FLAT_RING3_DS 0xe033 /* GDT index 262 */ #define FLAT_RING3_SS 0xe033 /* GDT index 262 */ #define FLAT_KERNEL_CS FLAT_RING1_CS #define FLAT_KERNEL_DS FLAT_RING1_DS #define FLAT_KERNEL_SS FLAT_RING1_SS #define FLAT_USER_CS FLAT_RING3_CS #define FLAT_USER_DS FLAT_RING3_DS #define FLAT_USER_SS FLAT_RING3_SS #define __HYPERVISOR_VIRT_START_PAE 0xF5800000 #define __MACH2PHYS_VIRT_START_PAE 0xF5800000 #define __MACH2PHYS_VIRT_END_PAE 0xF6800000 #define HYPERVISOR_VIRT_START_PAE \ mk_unsigned_long(__HYPERVISOR_VIRT_START_PAE) #define MACH2PHYS_VIRT_START_PAE \ mk_unsigned_long(__MACH2PHYS_VIRT_START_PAE) #define MACH2PHYS_VIRT_END_PAE \ mk_unsigned_long(__MACH2PHYS_VIRT_END_PAE) /* Non-PAE bounds are obsolete. */ #define __HYPERVISOR_VIRT_START_NONPAE 0xFC000000 #define __MACH2PHYS_VIRT_START_NONPAE 0xFC000000 #define __MACH2PHYS_VIRT_END_NONPAE 0xFC400000 #define HYPERVISOR_VIRT_START_NONPAE \ mk_unsigned_long(__HYPERVISOR_VIRT_START_NONPAE) #define MACH2PHYS_VIRT_START_NONPAE \ mk_unsigned_long(__MACH2PHYS_VIRT_START_NONPAE) #define MACH2PHYS_VIRT_END_NONPAE \ mk_unsigned_long(__MACH2PHYS_VIRT_END_NONPAE) #define __HYPERVISOR_VIRT_START __HYPERVISOR_VIRT_START_PAE #define __MACH2PHYS_VIRT_START __MACH2PHYS_VIRT_START_PAE #define __MACH2PHYS_VIRT_END __MACH2PHYS_VIRT_END_PAE #ifndef HYPERVISOR_VIRT_START #define HYPERVISOR_VIRT_START mk_unsigned_long(__HYPERVISOR_VIRT_START) #endif #define MACH2PHYS_VIRT_START mk_unsigned_long(__MACH2PHYS_VIRT_START) #define MACH2PHYS_VIRT_END mk_unsigned_long(__MACH2PHYS_VIRT_END) #define MACH2PHYS_NR_ENTRIES ((MACH2PHYS_VIRT_END-MACH2PHYS_VIRT_START)>>2) #ifndef machine_to_phys_mapping #define machine_to_phys_mapping ((unsigned long *)MACH2PHYS_VIRT_START) #endif /* 32-/64-bit invariability for control interfaces (domctl/sysctl). */ #if defined(__XEN__) || defined(__XEN_TOOLS__) #undef ___DEFINE_XEN_GUEST_HANDLE #ifdef __GNUC__ #define ___DEFINE_XEN_GUEST_HANDLE(name, type) \ typedef struct { type *p; } \ __guest_handle_ ## name; \ typedef struct { union { type *p; uint64_aligned_t q; }; } \ __guest_handle_64_ ## name #else /* __GNUC__ */ /* * Workaround for 6671857. */ #define ___DEFINE_XEN_GUEST_HANDLE(name, type) \ typedef struct { type *p; } \ __guest_handle_ ## name; \ typedef struct { union { type *p; uint64_aligned_t q; } u; }\ __guest_handle_64_ ## name #endif /* __GNUC__ */ #undef set_xen_guest_handle #define set_xen_guest_handle(hnd, val) \ do { if ( sizeof(hnd) == 8 ) *(uint64_t *)&(hnd) = 0; \ (hnd).p = val; \ } while ( 0 ) #define uint64_aligned_t uint64_t __attribute__((aligned(8))) #define __XEN_GUEST_HANDLE_64(name) __guest_handle_64_ ## name #define XEN_GUEST_HANDLE_64(name) __XEN_GUEST_HANDLE_64(name) #endif #ifndef __ASSEMBLY__ struct cpu_user_regs { uint32_t ebx; uint32_t ecx; uint32_t edx; uint32_t esi; uint32_t edi; uint32_t ebp; uint32_t eax; uint16_t error_code; /* private */ uint16_t entry_vector; /* private */ uint32_t eip; uint16_t cs; uint8_t saved_upcall_mask; uint8_t _pad0; uint32_t eflags; /* eflags.IF == !saved_upcall_mask */ uint32_t esp; uint16_t ss, _pad1; uint16_t es, _pad2; uint16_t ds, _pad3; uint16_t fs, _pad4; uint16_t gs, _pad5; }; typedef struct cpu_user_regs cpu_user_regs_t; DEFINE_XEN_GUEST_HANDLE(cpu_user_regs_t); /* * Page-directory addresses above 4GB do not fit into architectural %cr3. * When accessing %cr3, or equivalent field in vcpu_guest_context, guests * must use the following accessor macros to pack/unpack valid MFNs. */ #define xen_pfn_to_cr3(pfn) (((unsigned)(pfn) << 12) | ((unsigned)(pfn) >> 20)) #define xen_cr3_to_pfn(cr3) (((unsigned)(cr3) >> 12) | ((unsigned)(cr3) << 20)) struct arch_vcpu_info { unsigned long cr2; unsigned long pad[5]; /* sizeof(vcpu_info_t) == 64 */ }; typedef struct arch_vcpu_info arch_vcpu_info_t; struct xen_callback { unsigned long cs; unsigned long eip; }; typedef struct xen_callback xen_callback_t; /* * Structure used to capture the register state at panic time. This struct * is built to mimic a similar structure in Solaris. If there is interest * in making this panic implementation an official part of Xen, this should * be made more platform-neutral. */ struct panic_regs { unsigned long pad1; unsigned long pad2; unsigned long gs; unsigned long fs; unsigned long es; unsigned long ds; unsigned long edi; unsigned long esi; unsigned long ebp; unsigned long esp; unsigned long ebx; unsigned long edx; unsigned long ecx; unsigned long eax; unsigned long pad3; unsigned long pad4; unsigned long eip; unsigned long cs; unsigned long efl; unsigned long pad5; unsigned long ss; }; #endif /* !__ASSEMBLY__ */ /* Offsets of each field in the xen_panic_regs structure. */ #define PANIC_REG_PAD1 0 #define PANIC_REG_PAD2 4 #define PANIC_REG_GS 8 #define PANIC_REG_FS 12 #define PANIC_REG_ES 16 #define PANIC_REG_DS 20 #define PANIC_REG_EDI 24 #define PANIC_REG_ESI 28 #define PANIC_REG_EBP 32 #define PANIC_REG_ESP 36 #define PANIC_REG_EBX 40 #define PANIC_REG_EDX 44 #define PANIC_REG_ECX 48 #define PANIC_REG_EAX 52 #define PANIC_REG_PAD3 56 #define PANIC_REG_PAD4 60 #define PANIC_REG_EIP 64 #define PANIC_REG_CS 68 #define PANIC_REG_EFL 72 #define PANIC_REG_PAD5 76 #define PANIC_REG_SS 80 #define PANIC_REG_STRUCT_SIZE 84 #endif /* __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__ */ /* * Local variables: * mode: C * c-set-style: "BSD" * c-basic-offset: 4 * tab-width: 4 * indent-tabs-mode: nil * End: */